Oiling system



May 11,1926. Y 1,584,494

J. R. TILLMAN OILING SYSTEM Filed MarCh l5, 1918 2 Sheets-Sheet l illllllllllll by MQW WWIS.

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JOHN R.. TII'ILMAN, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO LOCOMOBILE COMPANY OF AMERICA, INCORPORATED, OF NEW YORK,

N. Y., A CORPORATION OF NEW YORK.

OILING SYSTEM.

Appication' led March 15, 1918.

This invention relates to oiling systems for engines, and is more especially concerned with an oil pump having special application tointernal combustion engines of the' class in which oil is drawn from the lower portion of a crank case, and is discharged through conduits leading to various bearing surfaces.

My invention will be best understood by reference -to the following description, when takenA in connection with the accompanying drawings ofone specific embodiment thereof, While its scope will be more particularly pointedY out in theY appended claims.

In the drawings:

Fig. 1 is a vertical, cross-sectional view of a portion of theV crank case of an engine equipped with an oiling system having an oil pump embodying my invention;v

Fig. 2 isV a. sectionalview on line 2-2. of Fig. 1; and' Fig. 3'isa sectional view Online 3 3 of Fig. 1.

Referring tothe drawings, and to the embodiment of my invention which I have selected for illustration, I have there shown a portion of an engine crank case comprising-l an upper part Ll, and a lower part 5, one separable from the other in a usual and well-known manner. The upper part is provided with a usual main oil duct 6, and plurality ofVv branch ducts 7 and 8, for supplying bearing surfaces which it is unnecessary hereto show Qr describe.

Supported by the upper part of the crank case, and depending` into its lower part, is an oilA pump which is so arranged as to make it possible to remove either the pump or the lower part of the crank case without disturbingA the other.4 To thisend, I have herein provided the lower part of the crank' case with. an opening 9 for the removalv of the pump, and have provided a closure. 1.0 normally to close said opening. PreferablyV the'latter is in' the bottom of the crank case, and the pump is of a. vertical type, so that the latter may be withdrawn in. a downward direction from the crank case.. The closure 10 may be. and is herein, provided witha depression 11, constituting a well, from: which the pump draws its supply., it being understood, of course, that the oil, after passing through the system Serial No. 222,527.

to the bearings, gravitates back to this well, where it is again taken by the pump. The plate 10 is herein in the form of a circular cover, having its flange 12 perforated to receive suitable fastening means, herein comprising a plurality of cap-screws 13. A gasket 14 may be interposed between the cover-plate and the crank case to ensure a non-leaking joint.

The pump may be of any suitable type, but in the present example, I have shown a gear pump, comprising a pair of fluidpropelling gears 15 and 16, operating in a well-known manner t0 draw the oil `from the source of supply, and to discharge the same into the passages leading to the bearing surfaces. These gears may be driven by any suitable means, but in the present example, the gear 15 is provided with a shaft 17, which extends in an upward direction through the lower part 5 of the crank case to the upper part 4, where it is provided with suitable driving means, which may include a gear 18. The gear 16, which is driven by the gear 15, may be provided with a short shaft 19. 4

The pump may be provided with any suitable form of housing', but in the present instance, I have shown a pump housing comprising a4 plurality of parts, including two caps 20 and 21, and an intermediate gear casing 22, the latter being provided with an intake passage 23, through which the oil is drawn by the gears 15 and 16. The gear casing is also provided. with a discharge passage 24,'best shown in Figs. 2 and 3, which receives the oil from the gears, and discharges the same into a discharge chamber 25, formed in the cap 21. The gear casing 22 may be, and is'herein, provided with a boss 26, forming af bearing for the shaft 17, and a second boss 27, forming a bearing for the shaft 19. Preferably both bosses extend into the chamber 25, and preferably the boss 26 is extended into, and fits, an opening 2S, providedn in the cap 21, as best shown in Fig. 1. The two caps and the interposed gear casing may be secured together by aplurality o-f screws 29, passing through all three of these parts, and preferably threaded into the upper cap 21, so that the screws may be removed in a downward direction, and the internal parts of the pump rendered accessible for inspection and repair, without the necessity of removing the entire pump.

The pump may be provided with any appropriate discharge passage, communicating in any suitable way with the ducts leading to the bearing surfaces, but in the present example, a discharge passage 3() is formed by providing the cap 21 with an integral, tubular extension 31, which also forms a housing for the shaft 17, and is provided at its upper end with a bearing 32 for said shaft. An inner housing 33, preferably in the form of a tube, connects the bearings 26 and-32, and is interposed between the passage 30 and the shaft 17, thereby preventing the escape of oil in an upward direction through the bearing 32.

Any suitable arrangement may be provided for communication between the discharge passage 30 and the duct 6, but in the present example, the latter extends laterally into a vertical bore 34, into which t-he tubular extension is snugly fitted, said extension being provided with a lateral port 35, registering with the adjacent end of the duct 6. 'Ihus it is possible to remove and replace the pump, and to connect and disconnect the passages by simply sliding the tubular extension 31 in a vertical direction in the bore 34.

As a means for securing the pump to the upper part 4 of the crank case, I have herein provided the tubular extension 31 with a flange 36, to receive a plurality of screws 37, by means of which said flange may be secured to the under side of the upper part 4. These screws may be rendered accessible for the purpose of removing the pump,l without disturbing the lower -part 5 of the crank case, by providing the latter with a lateral aperture 38, normally closed by a coverplate 39, secured in its place by screws 40. By simply removing this plate, a wrench or screw-driver may be introduced to effect the removal of the screws 37. Thus it is evident that, by removing the cover-plates 10 and 39, the pump may be dismounted as a unit, without disturbing the low-er part 5 of the crank case. It is alsoevident that, since the pump is supported by the' upper part of the crank case, the lower part may be removed without disturbing the pump.

Preferably, the pump depends into the aperture 9, and is separatedvfrom the margin of'the latter by a space sufficient to permit oil to gravitate into the depression 11. By making the pump extend through the aperture 9 into the depression 11, removal of the cap 10 renders the lower end of the pump readily accessible, without the necessity of reaching into said aperture. Preferably, the pump is provided with a suitable screen 41. which may be, and in the present example is, in the form of a perforated cylthe pump. The advantage of these features l will be readily appreciated.

While I have herein shown and described one specific form or embodiment of my invention, and have disclosed and discussed in detail the construction and arrangement incidental to one specific application thereof, it is to be understood that my invention is limited neither to the mere details or relative arrangement of parts, nor to its specific embodiment herein shown, but that extensive deviations from the illustrated form or embodiment of the invention may be made, without departing from the principles thereof.

I-'Iaving thus described one form of my invention, what I claim and desire by Letters Patent to secure is:

1. In an oiling system for engines, the combination of a casing having an opening, a pump disposed within said casing and having a strainer, said pump and its associated parts being bodily removable through said opening and said strainer being individually removable through said opening, and a closure for said opening.

2. In a gear pump, the combination of a housing comprising a plurality of parts including two caps and an intermediate gear casing, said gear casing being provided with an intake chamber, and one of said caps being provided with a discharge chamber, means to secure said parts together, and a pair of cooperating fluid-propelling gears housed in said gear casing, said gears having shafts extending from said casing into said cap which is provided with a discharge chamber, one of said shafts terminating within said discharge chamber.

3. In a gear pump, the combination of a housing comprising a plurality of parts including two caps and an intermediate gear casing, said gear casing being provided with an intake chamber, and one of said caps being provided with a discharge chamber, means to secure said parts together, and a pair of cooperating fluid-propelling gears housed in said gear casing, said gears having shafts extending into said cap which is provided with a discharge chamber, one of said shafts terminating within said discharge chamber, and an inner housing fo the other of said shafts. f

4. In a gear pump, the combination of a receive said boss, means to secure said parts housing comprising a plurality of parts intogether, and a pair of cooperating fluidcluding two caps and an intermediate gear propelling gea-rs, one of which is provided 10 casing, said gear casing being provided with with a shaft having a bearing in said boss.

5 an intake chamber and having a projecting In testimony whereof, I have signed my boss, and one of said caps being provided name to this speciiication. with a discharge chamber and an opening to JOHN R. TILLMAN. 

